/* capfs_file_mmap()
*/
static int capfs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
struct address_space *mapping = file->f_dentry->d_inode->i_mapping;
struct inode *inode = file->f_dentry->d_inode;
/* update the statistics */
if(capfs_collect_stats) capfs_vfs_stat.mmap++;
PENTRY;
PDEBUG(D_FILE, "capfs_file_mmap called.\n");
/* do not allow sneaky stores/mov's into the mapped address range */
if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE)) {
if (!mapping->a_ops->writepage)
return -EINVAL;
}
inode->i_mapping->host = inode;
inode->i_mapping->a_ops = &capfs_file_aops;
if (!mapping->a_ops->readpage)
return -ENOEXEC;
vma->vm_flags |= VM_SEQ_READ;
vma->vm_flags &= ~VM_RAND_READ;
inode->i_mapping->backing_dev_info = &capfs_backing_dev_info;
PEXIT;
return generic_file_readonly_mmap(file, vma);
}
/*
* Memory map a region of a file.
*/
static int orangefs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
gossip_debug(GOSSIP_FILE_DEBUG,
"orangefs_file_mmap: called on %s\n",
(file ?
(char *)file->f_path.dentry->d_name.name :
(char *)"Unknown"));
/* set the sequential readahead hint */
vma->vm_flags |= VM_SEQ_READ;
vma->vm_flags &= ~VM_RAND_READ;
/* Use readonly mmap since we cannot support writable maps. */
return generic_file_readonly_mmap(file, vma);
}
